Our Drawings
What you actually receive
A numbered, revision-controlled, signed drawing set — issued in stages so you always know which sheets may be built from and which may not. This is the deliverable itself: how it is numbered, when it is issued, what is on it, and what ships alongside it.
Our project drawings
The real deliverable, produced for your building and issued to you. Confidential to your project — we never publish a client’s drawings, which is exactly why the samples exist.
Sample drawings
19 specimen sheets drawn on a neutral reference building, watermarked and marked not for construction, so you can see the standard of output before you commit.
Open the sample registerIssue Stages
Every sheet says what it may be used for
The revision code in the title block is not decoration — it is permission. A drawing at P2 is for coordination; the same drawing at C1 may be ordered and installed from. Most cost disputes on site start with someone building from the wrong revision.
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P1
Preliminary — for comment
First issue of a layout. Plant sizes are indicative and routes will move. Circulated inside the design team only.
- May be used to
- Comment, sanity-check the strategy, confirm plant room and riser allowances.
- Must not be used to
- Order equipment, cast slabs, or price the work.
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P2
Preliminary — for coordination
Issued to the architect and structural engineer. Penetrations, riser positions and ceiling void depths are now being agreed.
- May be used to
- Coordinate structure, agree builders work, fix riser and plant room sizes.
- Must not be used to
- Fabricate, or treat any dimension as final.
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P3
Preliminary — for approval
Issued for client sign-off and for statutory submission to the county, fire authority, NEMA or EPRA as applicable.
- May be used to
- Submit for approval, sign off the design intent, budget with confidence.
- Must not be used to
- Build — approval comments still have to be absorbed.
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T
Tender issue
Scope frozen for pricing, issued with the specification and bill of quantities so every tenderer prices the same building.
- May be used to
- Go out to tender, evaluate returns on a like-for-like basis.
- Must not be used to
- Start on site; tender queries usually generate a revision.
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C1
Construction issue
Coordinated and clash-free at LOD 350. This is the first revision a contractor is permitted to build from, and it is signed.
- May be used to
- Order, fabricate, install. Set out from figured dimensions.
- Must not be used to
- Deviate without a written instruction and a revised sheet.
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C2+
Construction — revised
Reissued after a site instruction or a design change. The revision cloud and the revision table say exactly what moved and why.
- May be used to
- Build to the current revision only.
- Must not be used to
- Work from a superseded print — earlier revisions are formally withdrawn.
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AB
As-built record
Redrawn from site records to show what was actually installed, not what was designed. Issued with the O&M manual at handover.
- May be used to
- Operate, maintain, alter and extend the building for its whole life.
- Must not be used to
- Be skipped — a building without as-builts is expensive to own.
Numbering
A sheet number that never moves
Every document we issue carries the same four-part reference, so a sheet can be found, superseded and audited years later without guesswork.
- TMEPOriginator
- TechMEPi Engineering — fixed on every document we issue.
- PHDiscipline
- PH, DR, ME, FF, EL, EE, SP, BIM or STD — see the series below.
- DWGDocument type
- DWG drawing · CAL calculation · SCH schedule · SPC specification · RPT report.
- 101Sheet number
- Sequential within the discipline series, so a sheet number never moves.
File naming TMEP-PH-DWG-101-P2.pdf — the revision is part of the filename, so a superseded sheet can never be confused with a current one.
Drawing Register
9 discipline series, 52 sheet types
Which of these your project needs depends on the building — a villa will not need a medical gas series and a hospital will need all of it. Your drawing list is agreed and priced before we start, so there are no surprise sheets and no missing ones.
Public Health — Water Services
Sheets 100 – 199
- Cold & hot water layouts, floor by floor
- Storage, break tank and booster set schematic
- Riser diagram with pressure zones
- Water treatment process flow
- Sanitary fitting and pipe-size schedule
- Valve and isolation schedule
Drainage & Wastewater
Sheets 200 – 299
- Above-ground foul drainage layouts
- Below-ground drainage plan with invert and cover levels
- Longitudinal sections through the manhole run
- Surface water, roof drainage and attenuation
- Sewage treatment plant flow and tank sections
- Manhole and inspection chamber schedule
Mechanical — HVAC
Sheets 300 – 399
- Ventilation and ductwork layouts
- Chilled water and heating schematics
- Refrigerant pipework and indoor unit layouts
- Plant room layouts and sections
- Air terminal and equipment schedules
- Duct sizing and commissioning data
Fire Protection
Sheets 400 – 499
- Hose reel and extinguisher coverage study
- Wet / dry riser and landing valve layouts
- Sprinkler layouts and installation control valve set
- Fire pump room schematic and hydraulic calculation
- Detection, alarm and cause-and-effect matrix
- Fire-stopping penetration register
Electrical & ICT
Sheets 500 – 539
- Small power, lighting and data layouts
- Containment and segregation layouts
- LV single-line diagram
- Distribution board circuit schedules
- Earthing and lightning protection
- Volt drop, fault level and discrimination study
Renewable & Standby Power
Sheets 540 – 559
- Solar PV array layout and string diagram
- Inverter, battery and changeover schematic
- Generator, fuel and exhaust layouts
- Energy yield and payback model
- Export limiting and metering arrangement
Specialist Systems
Sheets 560 – 599
- Medical gas pipeline layouts and AVSU schedule
- Manifold and plant room schematic
- LPG reticulation and bulk storage layouts
- Swimming pool circulation and dosing schematic
- Compressed air and vacuum distribution
- Terminal unit and outlet schedules
BIM Coordination
Sheets 600 – 699
- Federated building sections
- Ceiling void and riser zoning drawings
- Plant room coordinated layouts with clearances
- Structural penetration drawings for the engineer
- Weekly clash report and resolution log
- As-built federated model at handover
Standard Details
Sheets 900 – 999
- Pipe support, hanger and anti-vibration details
- Fire-stopping at wall and floor penetrations
- Sleeves, puddle flanges and slab crossings
- Inspection chamber and gully details
- Plant connection and access panel details
The Package
A drawing is never issued on its own
Eight things come with the sheets. Drop any one of them and someone downstream — contractor, approving authority or facilities team — is left guessing.
Drawings
The coordinated sheets themselves, signed, numbered and revision-controlled.
Calculations
Pipe sizing, duct sizing, cooling loads, hydraulics, volt drop and fault level — the working behind every figure on the drawing.
Schedules
Equipment, valve, circuit, air terminal and sanitary fitting schedules, each cross-referenced to a drawing tag.
Specification
What each system must be, do and be tested to — the document a contractor is held to when the drawing is silent.
Tender documents
Bill of quantities and drawing schedule so every tenderer prices the same scope.
Test & commissioning records
Pressure, air, leakage, electrical and flow test sheets, plus the balance and commissioning results.
O&M manual
How the building is run and serviced, with manufacturer literature, warranties and a planned maintenance schedule.
As-builts & model
Record drawings and, where BIM is in scope, the federated as-built model handed to the facilities team.
Formats & Handover
Issued in the formats your team can use
The signed PDF is the contractual drawing. Everything else exists so the contractor, the other consultants and eventually the facilities team can do their jobs without re-drawing our work.
Superseded revisions are formally withdrawn on issue, so the current set is the only set in circulation.
Get your drawing list- PDF The issued, signed record. Contractually this is the drawing — everything else is a convenience copy.
- DWG AutoCAD, for the contractor and for the other consultants to reference into their own sheets.
- RVT The native Autodesk Revit model, where BIM is within the appointment.
- IFC / NWD Open exchange and Navisworks federation for clash review across all disciplines.
- XLSX Schedules and calculations in a form the contractor and facilities team can actually reuse.
Judge It Yourself
Don’t take the description on trust
Open 19 specimen sheets and read the title blocks, the general notes and the calculated sizes. Then send us a plan and we will come back with the exact drawing list your building needs.